Have no idea any ID help

[Andy 71]

Hi all
had to change my light over a month ago and don't know if it is the Light or The RO wich is LSP as my tank is only a nano
main water is NSW the Brown?
all i can put it down to is RO or light i have not tested the RO as o do not have a TDS
the Coral was really good at one point don't know what has gone wrong
any help on this i am uk based
Thanks

 

[T-J]

I'd love to help you, but I'm having difficulty deciphering what your question/problem is. Are you saying that you had some coral that was doing well, and how now died? And you think it might be due to your change of light or maybe your RO water supply?

If that's the case, here are some questions to answer:
What coral type?
Are you using RO or RODI?
Light brand?
Tank age?
Parameters (salinity, alk, calc, nitrate, phosphate, temp, etc.)
Any additional information would be great!

 

[Andy 71]

Sorry was doing it quick
also the Brown in the tank

Soft coral
tank age 7ys
would not no on RO as i get from LPS
light is fluval marine 3 LED had about
Fluval Nano 51L

Salinity. 26

Colombo test kit
Phos-0.03

Red Sea test kit
No2 -0
HP-8.0
No3- 0.2
Ammonia-0
KH- DKH-4 MEQ/l 1.4

 

[Andy 71]

Light settings